Package edu.cmu.tetrad.bayes

Class CptMapProbs

java.lang.Object

edu.cmu.tetrad.bayes.CptMapProbs

All Implemented Interfaces:

CptMap, TetradSerializable, Serializable

public class CptMapProbs
extends Object
implements CptMap

Represents a conditional probability table (CPT) in a Bayes net. This represents the CPT as a map from a unique integer index for a particular node to the probability of that node taking on that value, where NaN's are not stored.

Author:

josephramsey

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
CptMapProbs(double[][] probMatrix)	Constructs a new probability map based on the given 2-dimensional array.
CptMapProbs(int numRows, int numColumns)	Constructs a new probability map, a map from a unique integer index for a particular node to the probability of that node taking on that value, where NaN's are not stored.

Method Summary

Modifier and Type	Method	Description
void	assignRow(int rowIndex, Vector vector)	Assigns the values in the provided vector to a specific row in the probability map.
double	get(int row, int column)	Returns the probability of the node taking on the value specified by the given row and column.
int	getNumColumns()	Returns the number of columns in the probability map.
int	getNumRows()	Returns the number of rows in the probability map.
void	set(int row, int column, double value)	Sets the probability of the node taking on the value specified by the given row and column to the given value.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CptMapProbs

public CptMapProbs(int numRows,
 int numColumns)

Constructs a new probability map, a map from a unique integer index for a particular node to the probability of that node taking on that value, where NaN's are not stored. This probability map assumes that there is a certain number of rows and a certain number of columns in the table.

Parameters:

numRows - the number of rows in the table

numColumns - the number of columns in the table

CptMapProbs

public CptMapProbs(double[][] probMatrix)

Constructs a new probability map based on the given 2-dimensional array.

Parameters:

probMatrix - the 2-dimensional array representing the probability matrix

Throws:

IllegalArgumentException - if the number of columns in any row is different

Method Details

get

public double get(int row,
 int column)

Returns the probability of the node taking on the value specified by the given row and column.

Specified by:

get in interface CptMap

Parameters:

row - the row of the node

column - the column of the node

Returns:

the probability of the node taking on the value specified by the given row and column

set

public void set(int row,
 int column,
 double value)

Sets the probability of the node taking on the value specified by the given row and column to the given value.

Parameters:

row - the row of the node

column - the column of the node

value - the probability of the node taking on the value specified by the given row and column (NaN to remove the value)

getNumRows

public int getNumRows()

Returns the number of rows in the probability map.

Specified by:

getNumRows in interface CptMap

Returns:

the number of rows in the probability map.

getNumColumns

public int getNumColumns()

Returns the number of columns in the probability map.

Specified by:

getNumColumns in interface CptMap

Returns:

the number of columns in the probability map.

assignRow

public void assignRow(int rowIndex,
 Vector vector)

Assigns the values in the provided vector to a specific row in the probability map.

Parameters:

rowIndex - the index of the row to be assigned

vector - the vector containing the values to be assigned to the row

Throws:

IllegalArgumentException - if the size of the vector is not equal to the number of columns in the probability map